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I hope to read more in the post-mortem RCA but I am curious what their flighting missed, is flighting so limited that is does not see the cross region scale or something? I also had the feeling from watching Mark Russinovich discuss previous failures that their patch rollouts were much more controlled.

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Keith, you can find more details in the RCA that is published here: http://azure.microsoft.com/blog/2014/11/19/update-on-azure-s.... It is updated with more details on the flighting and issues we encountered.

What I've seen from their patching of ordinary machines, I would say its pretty far from controlled or well thought through. Their patching has led to our machines becoming unavailable before, despite that we have multiple machines in the same availability set. We've been in contact with support to describe what happens and have gotten an Oh, its by design-response back.

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